It's pretty common to Christian, especially Protestant, theology and culture.
"There is neither Jew nor Gentile, neither slave nor free, nor is there male and female, for you are all one in Christ Jesus. If you belong to Christ, then you are Abraham’s seed, and heirs according to the promise."
And that principle is the often (most?) quoted part of the Declaration of Independence:
"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the Pursuit of Happiness."
A few years later, the U.S. Constitution banned titles of mobility. We are probably overdue to follow up with nixing professional titles and titles for government officials (Mr. President, Your Honor, etc.).
It's not clear to me that Orwell was saying that. And neither of the passages I vite are talking about laws as such. The Declaration of Independence was certainly extralegal, and perhaps it is more foundational than any given body of law, even.
That's a pretty political bent on things, especially if you are considering the protestant world view:
"For it is by grace you have been saved, through faith--and this not from yourselves, it is the gift of God -- not by works, so that no one can boast." (book of Ephesians)
The text (and theology) clearly divorce the outcome from the work being done. Frankly a plan reading of the text would be sympathetic to socialism (also see the day of Pentecost, the parable of the workers, etc..). It's very tortured to suggest that somehow this is actually a libertarian "pull yourself up" world view.
I know, the idea that we'd all be born into more or less equal stations and afforded the more or less the same opportunities, is a thought too frightening to behold amiright?
And who on earth would seriously think that this would be any other than total nightmare?